Sprayer



oct. 27, 1925. 1,558,593

J. G. COFFIN @13 Ww @M01/wud.

Oct. 27 1925.

F'iled April 30. 1925 1,558,593 J. G. coFFlN SPRAYER 2 Sheets-Sheet 2.

@51g ma, flamme/ Patented' oct. 27, 1925.

UNITED STATESv PATENT OFFICE.

JOSEPH G. COFFIN, HEMPSTEAD, NEW YORK, ASSLGNOR T0 GENERAL RUBBER COM- PANY, OF NEW YORK, N. Y., A CORPORATION 0F NEW JERSEY.

SPRAYER.

Application filed April 30, 1923. Serial No. 635,536.

To all whom it may concern:

Be it known that I, JOSEPH G. CoFFtN, a citizen of the United` Sta-tes, residing at Hempstead, Long Island, county of Nassau, State of New York, have inventedy a certain new and useful Improvement in a Sprayer, of which the following is a full, clear, and exact description.

This invention relates to a sprayer, more particularly to a sprayer of the rotating disc type. j

It has been found that sprayers of this type are particularly applicable for comminuting rubber latex and discharging it into an atmosphere of a drying medium whereby the dried latex is deposited in the form of small particles which may be compacted to form crude rubber. Among other advantages of this type of sprayer are uni' form distribution of the particles, and relative uniformity of size of the particles under varying conditions. Sometimes'large particles are desired and at other times small ones may be preferred, and by merely changing the speed of rotation of the disc the desired end may be attained while at the same time maintaining the relative size uniform under 'any given condition.

An object of my lnvention is to provide .an improved sprayer of the rotating dise type.

Another object is to provide an improved means for distributing the fluid or fluids to be sprayed on the disc. v j

Another object .is to provide an adjusting means for the spr-aymg disc.

Still another object 1s to provide a centrifugal spraying unit having a self contained motor drive.-

Still another object is to provide an improved meansifor preventingoil drip from the bearings from reaching the spraying disc.

For a detailed disclosure of the invention j reference is had tothe accompan ing specification and drawings, in which atter:

Fig. 1 is a side elevation of the sprayer,

partly in section on the line v1--1 of Figure' Fig 2 is a transverse section, on the line 2-2 of Figure 1;

Fig. 3 is a transverse section, on the line Referring to the drawings the numeral 1 represents an elongated casting or frame, 1n the present instance of substantially cylindrical form, which is closed at the upper and lower ends, and is provided at its upper end with an attaching fiange 2 which issecured by bolts 3 to a supporting ring 4. The supporting ring 4 rests on 4,the ed e of the apertured plate 5, and is detachab y held thereto by means of the angled bolts 6 or in any other suitable manner. Also secured to the ange 2 by the bolts 3 is a spider 7 at the upper end of which is secured the frame 8 of an electric motor 9. It isv obvious however that any other suitable form of motor may be used.

The shaft 10 of the motor is hollow to provide an oil passage, and connected to the lower end of the shaft is one member of a flexible coupling 11, the other member of which is secured to the upper projecting end of a shaft 12 journaled in the fra-me 1, said projecting end being provided with an oil conducting passageway 13 in alinement with the passageway in shaft 10. The shaft 12 extends entirely through the frame 1 and toits lower end a spraying disc 14 is secured. The lower end of the shaft 12 is tapered except at that portion adjacent the dise 14, which portion is made cylindrical, as shown at .12. In the upper end of the frame 1 a taperedebearing sleeve 15 is se.`

from the interior of the adjusting nut 17 f is conducted to the bearing by means of the wick 19. A hollowT thrust bearing 20 is threaded `into the upperend 'of the adjusting nut 17 'and a series of thrust washers 21 are disposed around the shaft 12 Vbetween the 'bearing 20 and the lower member of the flexible coupling 11, oil being supplied to the thrust'washers and the interior of the thrust bearing through openings 22 in the shaft leading into the passageway 13. A

. series of'passages 23 lead from the` interior of the thrust bearing into the interior o f the hollow adjusting nut 17 to conduct oil into the latter. A gear wheel 1s rigidly secured to the thrust bearing 20` by a set screw 25, and this gear wheel 1s actuated by a pinlon 2G ou the lower end of a shaft 27, the latter carrying a hand wheel 28 at f therefrom.

its upper end.

i tember 12, 1922.

lt will be seen that b v adjustment ot' the hand wheel 28 the thrust bearing. shaft 12 and spraying disc 14 may be vertically adjusted, and a set screw 29 engages the .shaft 27 to hold the parts in adjusted position. Inl the present instance a plain bearing 3U is provided at the point where the shaft extends through the lower end of frame 1. but any other suitable bearing such as that shown at the upper end of the frame 1 may be used if desired. Oil from the interior of the frame 1 may be supplied to the bearing 30 by means of the wick 31. 1j. fj

Cast directly in the walls of the frame 1, in the present instance, are latex supply ducts 32, the number of which may be varied as desired. To the upper threaded end 32 of each of these ducts any suitable form of quick detachable connection may be secured for connection with a Supply pipe for feeding latex, water or a mixture of the two in the manner full)v set forth in patent to Bradley & Collin, No. 1,428,526, dated Sep- In some instances it may be desirable to add compounding ingredients to the latex. Such ingredients may be added to the latex before it is supplied to the ducts 32, or latex may be suppliedy to` certain of the ducts 32 and compounding ingredients to the others. Surrounding the frame 1 and detachably secured to the flange 2 is a cooling jacket 33 in which is disposed the supply pipe 34 for a cooling medium, which pipeleads through the flange 2. The flange 2 is also provided with an outlet 35 to which an exhaust pipe for the cooling medium may be connected.

The lower end of the frame 1 is provided with a threaded boss 36 to which is secured a shell 37, the latter having a downward extension or .nozzle 38 surrounding the lower portion of the shaft 12 and slightly spaced The inner wall of this extension is made cylindrical opposite the portion 12 of the shaft and is abruptly cut otf at the bottom, while the outer wall flares outwardly as shown at 38. The shell is also provided with an inner extension 39 surrounding the shaft 12, between whichexl tension and the shell proper an oil sump or well40 is formed. Secured to the shaft 12 `a short ,distance above the extension 39, is

' a deflector 41 for preventing oil drip'from sump 40.. Also removably secured to the frame linspa'ced relation to the shell 37 is a second shell 42 the interior of which is in communication with the latex supply ducts 32. Extending upwardly from the body ot' the shell 42 is a flange 43 forming a latex well 44. The inner shell 37 is provided with an exterior skirt or flange 45 orerhanging the flange 43, so that latex overflowing from the well 44 must pass up between the flanges 43 and 45, then over the-edge of the flange 43 and downwardly between the flange 43 and shell 37, thereby causing an even distribution -of the latex. 'lhreadedly secured in the lower end of the shell 42 is a nozzle 46 which terminates short of the flare 38 and together with the eX-' tension 38 forms an annular delivery oritice throughwhich the latex flows and over the flare 38 to the surface of the'spraying disc 14. It will be noted that the nozzle 4G is extended upwardly far enough within the shell 42 to form at 47 a second overflow flange similar to the flange 43. Su1'.

rounding the shell 42 is a third shell or cap 48 secured to the cooling jacket 33 and f pump to the upper end of the pipe51, exl cess oil accumulated in the sump 40 may be withdrawn when desired. It will be noted howeverv that if access of air were out off' from the oil sump 40 when suction was applied to the pipe 51 during operation, latex` would tend to be drawn up through the space between the shaft 12 and the extension 38 and 39. To prevent this an air inlet 52 is disposed in the upper end of the frame 1, hence when suction is applied to the pipe 51 air can enter through the inlet 52 and pass through the frame 1 and overflow pipe 50 into the sump 40. In the compounding of some rubber stocks even a small amount of oil may be detrimental, and in such cases the construction described prevents any Vlubricating oil from contaminatin(Y the rubber. For some purposes, however, 1t' may be de,- sirable to add a considerable amount of oil to the rubber. In this event the oil may be elnulsil'ied and supplied in admixture with the latex through ducts 32, or it ma be sup-n .l

plied to the suction pipe 51 anda lowed to overflow from the sump 40 between the shaft 12 and extension 38 and thence on tofthe spraying disc 14 with the latex in superposed relation thereto. Any other compounding ingredient which will not injuriously affect the lower bearing may also be supplied in this manner.

When in use the mode of operation is as follows The entire sprayer unit is secured by the bolts 6 to the plate 5, which latter may form part of the top of a-drying chamber. It will be seen from the previous description that a complete spraying unit with self contained motor is provided, and in case of accident or for any other reason, it may be readily detached and a new one substituted. The latex ducts 32 are placed in communication with ya latex and water supply system as previously mentioned, the pipe 34 connected to a source of supply for a cooling medium and the outlet 35 to an exhaust pipe and the sprayer started. As pointed out in the above mentioned patent, wheii spraying latex, it is desirable to first supply water only to the spraying disc, as owing to the high temperature of the drying medium in which the latter is disposed the disc 14 becomes quite hot and would tend to coagulate and burn the latex if the latter were supplied to it in the beginning. But by first supplying water and then gradually admitting latex and cutting off the supply of water the spraying disc may be kept cool until it is spraying lateX only. The latex flowing through the ducts 32 accumulates in the well 44 and overflows evenly therefrom into the lower part of the shell .42 where it again accumulates and flows over the top 47 of the nozzle 46. By this construction an even supply of latex is insured at all points in the annular discharge orifice between the nozzle 46 and the extension'38. It may sometimes be desirable to use removable liners of glass, waterproofed paperor other material in the ducts 32. lVhen withdrawn these can then be readily cleaned or others substituted. The size of the ducts can also be varied by this expedient. The flow of latex may be regulated by valves in the latex supply :system and it also may be regulated if desired by varying the size of the discharge opening formed between the extension 38 and the nozzle 46 By adjusting the thrust bearing 20and shaft 12 the position of the spraying disc 14 may also be varied without shutting down the sprayer.

In oiling the device oil may be supplied at the upper end of the hollow shaft 10 and flows down into the passageway 13 in the shaft 12. From this passageway it escapes through the openings 22 and between the thrust washers 21 into the interior of the thrust bearing 20, from which latter it flows down through the passages 23 into the hollow adjusting nut 17. From the interior of the nut 17 it .is supplied to the bearing 16 by means of the wick 19. Any excess dripsl down into the. bottom of the frame l and is supplied by the wick 31 to the bearing 30. Oil may accumulate in the bottom of the frame 1 until it reaches the level of the top of the pipe 50 when it overflows into the sump 40. Any oil escaping lfrom the bearing 30 also is directed into the sump 40 by the defiector 41. As before stated, excess oil in the sump 40 may be withdrawn when desired by means of the suction pipe 51. It has been found that in sprayers of the type described there is a tendency of the latex to creep up around the shaft from the disc and' clog up the oil sump and bearing. By making the lower portion of shaft 12 and the inner wall of extension 38 cylindrical and providing the flare 38 this difficulty is overcome. The lower end of extension 38 is cut off squarely, and in operation the disc is adjusted relatively closet to this end. The latex flows smoothly on to the disc from the flare 38 without any creeping action whatever.

It will be seen that by my invention a quick detachable completespraying unit has been provided in which" fluid .is evenly supplied to the spraying disc, and which may be readily adjusted and easily taken apart for purposes of inspection and cleaning. lVhile the device is particularly adapted for spraying latex, it is .not so limited in its application but/may be used for spraying liquids generally, and I do not desire the invention to be limited otherwise than as set forth in the appended claims.

Having thus described my invention, what I claim and desire to protect by Letters Patent is:

1. A sprayer `for latex or other liquid comprising a disc, means for Vrotating the same, means forming'an annular orifice for delivering liquid centrally of the disc, and successive overflow means for evenly supplying liquid to said orifice.

2. A sprayer for latex or other liquid comprising a frame, a shaft rotatably mounted therein, a spraying disc on the lower end thereof, a liquid collecting shell above the disc, stationary means forming an annular delivery orifice to the disc and communicating with said shell, overflow means in the shell for evenly distributing the liquid in said. orifice, and liquid supply conduits leading into said shell at spaced points.

3. A sprayer for latex or other liquid comprising a frame, a shaft journaled in said frame, a spraying disc carried by said shaft, a liquid well and delivery nozzle concentric with said shaft and detachably connected to the lower end of said frame, and means for supplying liquid to the Well at spaced points therein.

4. A sprayer for latex or other liquid comprising a frame, a shaft journaled therein and projecting therebeyond, a spraying disc carried by the projectlng sha-ft portion.

a cooling jacket surrounding 'said frame, a detachable extension thereof surrounding said projecting portion, a plurality of liquid4 supply means disposed within said jacket, and detachable liquid collecting and delivery nieans disposed within said extension and between the supply means and spraying disc.

5. A sprayer for latex or other liquid comprising a frame, a shaft journaled therein, a spraying disc carried by said shaft, spaced shells detachably connected to the lower end of said frame and forming a liquid well concentric with the shaft, and spaced nozzles carried by said shells and forming an annular liquid delivery orifice concentric with said shaft adjacent the disc.

6. A sprayer for latex or other liquid comprising a frame, a shaft rotatably mounted therein, a spraying disc carried by one end of said shaft, means adjacent theother end of the shaft for longitudinally adjusting it, and means for supplying liquid concentrically of the shaft.`

7. A sprayer for latex or other liquid comprising a frame, a shaft journaled therein and projecting above and below the frame, a spraying disc on. the lower end of said shaft, a motor having its shaft connected vto the upper end of said first shaft, a thrust bearing on said first shaft, and means for longitudinally adjusting said thrust bearing and first shaft.

8. -A sprayer for latex or other liquid comprising an enclosed fiame,"'a shaft passing therethrough and journaled in the ends tl1ereof, a liquid spraying disc carried by the shaft, means for supplying liquid thereto', an oil sump surrounding and `spaced from the shaft and detachably connected to theframe, and a deflector carried by the shaftl for preventing oil drip from passing through said space.

9. A sprayer for latex or other liquid comprising a frame, a shaft journaled therein and projecting therebeyond, a' spraying disc secured to the projecting end, an oil drip collecting shell detachably secured to ysaid frame and surrounding said projecting shaft end, a liquid collecting shell spaced` from said first shell and detachably connected to said frame, a liquid discharge nozzle connected to said last shell, and a cooling jacket surrounding said frame and shells.

10. A sprayer for latex or other liquidcomprising a disc, a shaft for rotating the same, means for delivering liquid to the disc concentrically of said shaft, bearings for tricallyof said shaft, means for preventing lubricant drip fiom tlie'shaft journals von said disc, suction means for withdrawing said drip, and means for preveniiig the suction from withdrawing liquid from the disc.

12. A sprayer for latex or other liquid comprising a disc, a shaft for rotating the same, bearings for the same, a liquid well concentric with said shaft and having an annular delivery orifice to the disc, an enclosed oil sump concentric with said shaft, a suction pipe communicating with said sump, and means for leading oil drip from the bearings to said sump, said means including means for supplying air to the sump.

13. A sprayer for latex or other liquid comprising a disc. a shaft for rotating the saine, an annular liquid delivery orifice surrounding and spaced from the shaft, and means for preventing creeping of the liquid into the space around the shaft.

14. A sprayer for latex or other liquid comprising a dise., a shaft for rotating the same, a nozzle surrounding and spaced from the shaft, said' nozzle having a squared end adjacent thejdisc 'and provided with an outer flared wall, a second nozzle surroundin'g the first, and means for' supplying liquid between said nozzles.

Signed at New York city, county of New York, and State of New York, this 26 day of April, 1923.

JOSEPH G. COFFIN. 

